View source for 4m19


==dihydrodipicolinate synthase from C. jejuni with pyruvate bound to the active site and Lysine bound to allosteric site==
<StructureSection load='4m19' size='340' side='right' caption='[[4m19]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4m19]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4M19 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4M19 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=LYS:LYSINE'>LYS</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene></td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=KPI:(2S)-2-AMINO-6-[(1-HYDROXY-1-OXO-PROPAN-2-YLIDENE)AMINO]HEXANOIC+ACID'>KPI</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4ly8|4ly8]]</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/4-hydroxy-tetrahydrodipicolinate_synthase 4-hydroxy-tetrahydrodipicolinate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.3.3.7 4.3.3.7] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4m19 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4m19 OCA], [http://pdbe.org/4m19 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4m19 RCSB], [http://www.ebi.ac.uk/pdbsum/4m19 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4m19 ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/DAPA_CAMJE DAPA_CAMJE]] Catalyzes the condensation of (S)-aspartate-beta-semialdehyde [(S)-ASA] and pyruvate to 4-hydroxy-tetrahydrodipicolinate (HTPA).[HAMAP-Rule:MF_00418] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Dihydrodipicolinate synthase (DHDPS), an enzyme found in most bacteria and plants, controls a critical step in the biosynthesis of l-lysine and meso-diaminopimelate, necessary components for bacterial cell wall biosynthesis. DHDPS catalyzes the condensation of pyruvate and (S)-aspartate-beta-semialdehyde, forming an unstable product that is dehydrated to dihydrodipicolinate. The tetrameric enzyme is allosterically inhibited by l-lysine, and a better understanding of the allosteric inhibition mechanism is necessary for the design of potent antibacterial therapeutics. Here we describe the high-resolution crystal structures of DHDPS from Campylobacter jejuni with and without its inhibitor bound to the allosteric sites. These structures reveal a role for Y110 in the regulation of the allosteric inhibition by lysine. Mutation of Y110 to phenylalanine results in insensitivity to lysine inhibition, although the mutant crystal structure reveals that lysine does bind in the allosteric site. Comparison of the lysine-bound Y110F structure with wild-type structures reveals that key structural changes due to lysine binding are absent in this mutant.

Tyrosine 110 plays a critical role in regulating the allosteric inhibition of Campylobacter jejuni dihydrodipicolinate synthase by lysine.,Conly CJ, Skovpen YV, Li S, Palmer DR, Sanders DA Biochemistry. 2014 Dec 2;53(47):7396-406. doi: 10.1021/bi5012157. Epub 2014 Nov, 18. PMID:25369463<ref>PMID:25369463</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4m19" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: 4-hydroxy-tetrahydrodipicolinate synthase]]
[[Category: Conly, C J.T]]
[[Category: Aldolase]]
[[Category: Lyase]]
[[Category: Schiff-base]]
[[Category: Tim barrel]]